CN110048038B

CN110048038B - Battery pack

Info

Publication number: CN110048038B
Application number: CN201810037326.XA
Authority: CN
Inventors: 徐铭鸿
Original assignee: Mobiletron Electronics Co Ltd
Current assignee: Mobiletron Electronics Co Ltd
Priority date: 2018-01-15
Filing date: 2018-01-15
Publication date: 2022-03-15
Anticipated expiration: 2038-01-15
Also published as: CN110048038A

Abstract

A battery pack, comprising: an outer box, which comprises a first box body, a second box body and a connecting frame; the first box body is provided with a first opening, the second box body is provided with a second opening which is matched with the first opening, and a containing chamber is formed between the first box body and the second box body; the connecting frame is connected to the second box body and provided with a first connecting strip and a second connecting strip, the first connecting strip is used for connecting the first box body, and the second connecting strip is used for connecting an installation part; and a plurality of batteries arranged in the accommodating chamber.

Description

Battery pack

Technical Field

The present invention relates to batteries; in particular to a battery pack.

Background

With the progress of science and technology, the demand for electric energy is also increasing day by day, and for the demand for large electric power, alternating current or a battery pack formed by connecting a plurality of batteries in series can be used as a power supply. The advantage of using a battery pack as the power source is that the power source is mobile and not limited to use in a fixed location.

Particularly, with the recent rise of environmental awareness, the vehicles driven by electric power energy are used to replace the vehicles driven by petrochemical fuels, so as to achieve the goals of zero emission and zero pollution, and is one of the important development trends of electric vehicles in the future. Among them, the battery pack can be called the heart of the electric vehicle, and is of no doubt as the core power source of the electric vehicle.

Disclosure of Invention

In view of the above, an object of the present invention is to provide a battery pack capable of effectively protecting a plurality of batteries disposed therein.

To achieve the above object, the present invention provides a battery pack, comprising: an outer box, which comprises a first box body, a second box body and a connecting frame; the first box body is provided with a first opening, the second box body is provided with a second opening which is matched with the first opening, and a containing chamber is formed between the first box body and the second box body; the connecting frame is connected to the second box body and provided with a first connecting strip and a second connecting strip, the first connecting strip is used for connecting the first box body, and the second connecting strip is used for connecting an installation part; and a plurality of batteries arranged in the accommodating chamber.

The invention has the effect that the battery in the battery pack can be effectively protected through the design of the outer box.

Drawings

Fig. 1 is a perspective view of a battery pack according to an embodiment of the present invention.

Fig. 2 is an exploded view of fig. 1.

FIG. 3 is an exploded view of the outer box of the above embodiment.

FIG. 4 is a partially exploded view of the outer box of the above embodiment.

FIG. 5 is a partial sectional view of the outer box of the above embodiment assembled.

Fig. 6 is a perspective view of the inside of the battery pack of the above embodiment.

Fig. 7 and 8 are exploded views of fig. 6.

Fig. 9 is a perspective view of the battery holder according to the above embodiment.

Fig. 10 is a perspective view of the first side frame of the battery holder according to the above embodiment.

Fig. 11 is a perspective view of the battery holder and the battery of the above embodiment after being assembled, and discloses an assembly manner of the frame and the first side frame.

Fig. 12 is an exploded perspective view of the insulating case and the battery lead tab of the above embodiment.

Fig. 13 is a perspective view of the battery lead tab of the above embodiment.

Fig. 14 is a side view of the battery lead tab of the above embodiment.

Fig. 15 is an exploded perspective view of the insulating case of the above embodiment.

Fig. 16 is a top view of the interior of the battery pack of the above embodiment.

Fig. 17 is a sectional view of the insulating case of the above embodiment, showing the coupling relationship of the insulating case and the battery terminal.

Fig. 18 is an exploded perspective view of another insulation can and battery lead tab of the above embodiment.

Fig. 19 is a perspective view of another battery lead tab of the above embodiment.

Fig. 20 is a side view of another battery lead tab of the above embodiment.

Fig. 21 is a partial top view of the interior of the battery pack of the above embodiment.

[ notation ] to show

[ invention ]

1 Battery pack

10 outer box

11 first box

11a first opening 11b and a perforated 11c cover

11d washer 11e mounting hole 11f terminal

11g transmission port 11h perforation 11i retaining wall

12 second opening of second container 12a

13 connecting frame

13a first connecting strip 13b and a second connecting strip 13c

13d side surface of the through hole 13e abutting surface 13f

14 adhesive tape 14a perforation

15 washer 16 guide tab 17 fuse

18 guide connecting piece 19 relay

20 cell

22 terminal 22a side 22b positioning block

22c inclined plane 22d stop plane

24 first terminal 26 second terminal 28 third terminal

29 guide connecting piece

30 battery monitoring device

40 battery holder

42 bottom frame 43 and support bar 43a first through hole

44 first side frame

45 side frame 45' side frame 452 main board

452a first stop surface 454 and a first side frame strip 454a first through hole

454b fourth aperture 456 second side frame strip 456a second aperture

456b fifth hole 458 and third hole 458 bottom frame 458a

46 second side frame 462 second stop surface

48, 48' frame

482 side plate 482a second through hole 484 top plate

484a Long hole

50, 50' battery lead tab

51 bridge 51a first side 51b second side

51c first surface 51d second surface

511 master part 512 first branch part 513 second branch part

52 first lead-in portion 52a first bent portion 52b first connection portion

52c perforation

53 second lead-in part 53a second bending section 53b second connecting section

53c perforation

60, 60' insulating case 60a with opening in compartment 60b

70 base

72 bottom plate 722 through hole 74 lower side wall

742 protruding block 742a inclined plane 76 standing wall

762 locating slot

80 upper cover

82 upper side wall 822 main wall 824 extension board

824a groove

90, 90' battery lead tab

91 bridge 91a first side 91b second side

91c first surface 91d second surface

92 first lead-in part 92a first extension 92b first bend

92c first connection section

93 second guide connection part 93a second extension section 93b second bending section

93c second connecting section

94 guide connecting piece

D1 first direction

D2 second direction

L1, L2 straight line

S, S5, S6 fastener

S1 bolt

S2 nut

S3 bolt

S4 nut

Detailed Description

In order to more clearly illustrate the present invention, a preferred embodiment will be described in detail below with reference to the accompanying drawings. Referring to fig. 1 to 3, a battery pack 1 according to an embodiment of the present invention includes an outer case 10 and a plurality of batteries 20.

The outer box 10 includes a first box 11, a second box 12 and a connecting frame 13, the first box 11 has a first opening 11a, the second box 12 has a second opening 12a, the second opening 12a is opposite to the first opening 11a, and a chamber is formed between the first box 11 and the second box 12 for disposing the batteries 20, the connecting frame 13 is connected to the second box 12.

In this embodiment, the top of the first container 11 is provided with two through holes 11b and two cover plates 11c, the two through holes 11b are communicated with the containing chamber and allow a user to observe the condition of the battery 20 inside the outer container 10 through the two through holes 11b, the two cover plates 11c are disposed on the two through holes 11b to seal the two through holes 11b, and in addition, a gasket 11d is further disposed between the two cover plates 11c and the two through holes 11b, so as to increase the sealing effect of the cover plates 11c and reduce the chance of foreign object intrusion. In addition, a plurality of mounting holes 11e are disposed on a side surface of the first case 11 for mounting components such as terminals 11f and a transmission port 11g, wherein in the present embodiment, the terminals 11f are respectively used for electrically connecting terminals of the internal battery 20, and the transmission port 11g is used for connecting a battery monitoring device 30 disposed inside the battery pack 1, so as to transmit signals between the battery monitoring device 30 and an external device, but the disclosure is not limited thereto.

In the embodiment, the number of the connecting frames 13 is four, and the connecting frames 13 are disposed around the periphery of the second container 12, since the structures of the connecting frames 13 are substantially the same, and the difference is different in length, the structure of one of the connecting frames 13 will be described later. The connecting frame 13 has a first connecting strip 13a, a second connecting strip 13b and a connecting plate 13c, the connecting plate 13c is used to be combined on the second box 12, the first connecting strip 13a and the second connecting strip 13b are respectively connected to two opposite sides of the connecting plate 13c, and in this embodiment, the first connecting strip 13a and the second connecting strip 13b extend from two sides of the connecting plate 13c to the same direction, the first connecting strip 13a is used to connect the first box 11, and the second connecting strip 13b is used to be connected to an installation location, wherein the installation location may be a base, a supporting frame, a fixing frame or a frame of an electric vehicle, but not limited thereto. Preferably, the first connecting bar 13a, the second connecting bar 13b and the connecting plate 13c are integrally formed, and thus, the effects of preferable supporting strength and uniform stress distribution can be obtained. In other applications, the connecting frame may be an integrally formed ring frame structure, and the four separate connecting frames are not limited.

Referring to fig. 3 to 5, in the present embodiment, the first connecting bar 13a is provided with a plurality of spaced through holes 13 d; a plurality of spaced through holes 11h are formed in the periphery of the opening 11a of the first box body 11; a rubber strip 14 is disposed on the first connecting strip 13a and the periphery of the opening 11a of the first case 11, the rubber strip 14 is disposed on an abutting surface 13e of the first connecting strip 13a away from the second connecting strip 13b, the rubber strip 14 is provided with a plurality of spaced through holes 14a, and a rigid gasket 15 is disposed in each through hole 14a, such that, when a connecting member such as a bolt S1 is passed through the through hole 11h of the periphery of the first case 11, passed through the gasket 15, the through hole 14a of the rubber strip 14 and the through hole 13d of the first connecting strip 13a and combined with a connecting member such as a nut S2, the periphery of the first case 11 is indirectly abutted against the abutting surface 13e of the first connecting strip 13a through the rubber strip 14, two ends of the gasket 15 can be abutted against the periphery of the first case 11 and the first connecting strip 13a, thereby preventing the rubber strip 14 from being excessively squeezed and deformed to lose its sealing property, And (4) a waterproof effect. In addition, preferably, an annular retaining wall 11i is further formed on the periphery of the first box 11, and the retaining wall 11i surrounds the side surface 13f of the first connecting strip 13a connected with the abutting surface 13e, so that the intrusion of foreign matters or the liquid pouring into the joint of the first box 11 and the second box 12 can be further prevented, and a good sealing protection effect can be provided.

Referring to fig. 6 to 8, in the present embodiment, the batteries 20 are arranged along a predetermined axial direction X, and the battery pack 1 further includes a battery holder 40 for holding the batteries 20. The battery monitoring device 30 is disposed on the battery holder 40 and electrically connected to the batteries 20, and the battery monitoring device 30 is located at one side of the batteries 20 in the predetermined axial direction X and within a projection range of the batteries 20 in the predetermined axial direction X, so that the space of the outer box 10 can be effectively and fully utilized and the space utilization rate can be improved by the arrangement of the battery monitoring device 30 and the batteries 20. In addition, as shown in fig. 3 and fig. 6, the terminal 11f installed in the first box 11 is electrically connected to the terminal of the battery 20 through the connecting piece 16, wherein a fuse 17 can be electrically connected between the connecting piece 16 and the terminal of the battery 20, but not limited thereto, the other terminal 11f installed in the first box 11 is electrically connected to the terminal of the other battery 20 through the connecting piece 18, wherein a switch device, such as a relay 19, can be electrically connected between the connecting piece 18 and the terminal of the battery 20, so as to control whether the connecting between the connecting piece 18 and the terminal of the battery 20.

As shown in fig. 6 to 11, the battery holder 40 includes a bottom frame 42, a first side frame 44 and a second side frame 46, wherein the bottom frame 42 includes two support bars 43 respectively located under two rows of battery packs formed by the arrangement of the batteries 20 to support the batteries 20. Each of the supporting bars 43 extends along the predetermined axial direction X, and one end of each of the supporting bars 43 has a first through hole 43 a.

The first side frame 44 includes two side frames 45, 45 ', the two side frames 45, 45' have the same structure, please refer to fig. 9 and fig. 10, which take a side frame 454 as an example, wherein the side frame 45 includes a main plate 452, a first side frame strip 454 and a second side frame strip 456, the main plate 452 is perpendicular to the predetermined axial direction X and has a first blocking surface 452a (see fig. 7), the first blocking surface 452a faces the row of batteries 20, the first side frame strip 454 and the second side frame strip 456 are respectively connected to two opposite sides of the main plate 452, and each of the first side frame strip 454 and each of the second side frame strip 456 extends along the same axial direction Z, wherein the first side frame strip 454 has two first through holes 454a, the second side frame strip 456 has two second through holes 456a, and the first through holes 454a correspond to the second through holes 456 a; the first through hole 454a of the first side frame strip 454 has a first width in the predetermined axial direction X, and the second through hole 456a of the second side frame strip 456 has a second width in the predetermined axial direction X, and the first width is greater than the second width. Preferably, each first perforation 454a and each second perforation 456a have the same height in the axial direction Z. In this embodiment, each of the first through holes 454a is a circular hole, and each of the second through holes 456a is an elongated hole having a long axis direction parallel to the predetermined axis direction X. In addition, the side frame 45 further includes a bottom frame strip 458 connected to the bottom of the main plate 452, and the bottom frame strip 458 has a plurality of third through holes 458a distributed along the axial direction Y. In the above description, the number of the first through holes 454a, the second through holes 456a, and the third through holes 458a are respectively multiple, and in practice, only one first through hole 454a, one second through hole 456a, and one third through hole 458a may be provided, but not limited to the above description.

In addition, the first side frame strip 454 further has a fourth through hole 454b, the second side frame strip 456 further has a fifth through hole 456b, and in the embodiment, the fourth through hole 454b and the fifth through hole 456b are circular holes respectively located near top edges of the first side frame strip 454 and the second side frame strip 456.

The two side frames 45, 45 'are adjacently disposed on the bottom frame 42, and the first side frame strip 454 of one side frame 45 is adjacent to the second side frame strip 456 of the other side frame 45' and fixed by a combination of bolts S3 and nuts S4 through the first through hole 454a of the adjacent first side frame strip 454 and the second through hole 456a of the adjacent second side frame strip 456.

Preferably, each side frame 45, 45' is a support bar 43 movably coupled to the bottom frame 42 in the predetermined axial direction X. In this embodiment, the width of each third through hole 458a in the predetermined axial direction X is greater than the width of each first through hole 43a in the predetermined axial direction X, wherein each third through hole 458a is an elongated hole whose long axial direction is parallel to the predetermined axial direction X, and each first through hole 43a is a circular hole; the bottom frame strips 458 and the supporting bars 43 of the bottom frame 42 are fixed by a bolt and nut combination S passing through the third through holes 458a and the corresponding first through holes 43 a.

The second side frame 46 is combined with the bottom frame 42 and is separated from the first side frame 44 by a distance in the predetermined axial direction X, the second side frame 46 has two second blocking surfaces 462, each second blocking surface 462 faces the first blocking surface 452a of the main plate 452 of each side frame 45, 45', and each battery 20 is located between the facing first blocking surface 452a and each second blocking surface 462. The battery pack is held by the first blocking surfaces 452a and the second blocking surfaces 462 at both sides of the battery pack formed by arranging the batteries 20, so that the fixing can be achieved. In this embodiment, the second side frame 46 is a single side frame structure, and the two second blocking surfaces 462 are located on the same surface of the single side frame, in practice, the second side frame 46 may also include another two side frames 45, 45' with the same structure, which are combined with the first side frame 44. The second side frame 46 may be coupled to the two groups of the supporting bars 43 in the same manner as the first side frame 44 is coupled to the two groups of the supporting bars 43.

The battery holder 40 of the present embodiment further includes two frames 48,48 ', the two frames 48,48 ' have the same structure, please refer to fig. 9, which illustrates an example of a frame 48, where the frame 48 includes a side plate 482 and a top plate 484, one end of the side plate 482 has a second through hole 482a for being combined with the first side frame 44, and the other end of the side plate 482 also has a second through hole 482a for being combined with the second side frame 46, wherein the width of each second through hole 482a in the predetermined axial direction X is greater than the width of each fourth through hole 454b and each fifth through hole 456b of the side frames 45, 45 ' in the predetermined axial direction X. The top plate 484 is connected to the top side of the side plate 482 and is perpendicular to the side plate 482, wherein the top plate 484 has a plurality of elongated holes 484a arranged at intervals along the predetermined axial direction X, and the long axis direction of the elongated holes 484a is parallel to the predetermined axial direction X, wherein, as shown in fig. 11, the elongated holes 484a are respectively used for passing through positioning members arranged between the batteries 20 and are combined on the positioning members through a combining member, so as to fix the positions of the batteries 20. In practice, the frame 48 may not be assembled.

One end of the side plate of one of the frames 48 'and the first side frame 454 which is not adjacent to the other side frame 45 (i.e. the first side frame 454 of the side frame 45') are fixed by a fastener S5, such as a bolt and a nut, passing through the corresponding fourth through hole 454b and the second through hole 482 a; one end of the other side plate 482 of the side frame 40 and the second side frame strip 456 not adjacent to the other side frame 45' (i.e., the second side frame strip 456 of the side frame 45) are fixed by a combination of a bolt S3 and a nut S4 passing through the corresponding fifth through hole 456b and the second through hole 482 a; the other ends of the side plates 482 of the two side frames 48, 48' are respectively coupled to two opposite sides of the second side frame 46, and in the present embodiment, the two side frames are fixed by a coupling member, such as a bolt S3 and a nut S4, passing through the second through hole 482a at the other end of the side plate 482 and the second side frame 46.

In this embodiment, the battery holder 40 is provided with a plurality of series-connected bars 49 connected between the first side frame 44 and the second side frame 46, and the series-connected bars 49 are used for connecting the batteries 20 in series and are connected to the first side frame 44 and the second side frame 46. In the embodiment, the string-connecting strip 49 is a long bolt, the batteries 20 have a plurality of through holes for the string-connecting strip 49 to pass through, wherein the use of the string-connecting strip is advantageous for alignment and alignment of the batteries 20, and nuts can be used to cooperate with the string-connecting strip 49, so that two ends of the string-connecting strip 49 can be respectively locked and fixed on the first side frame 44 and the second side frame 46, and the positions of the batteries 20 can be located by the cooperation of the first side frame 44, the second side frame 46 and the string-connecting strip 49.

With the above-mentioned structure of the battery holder 40, if the total lengths of the batteries 20 in two rows are different in the predetermined axial direction due to the tolerance of the casing of the batteries 20 when the plurality of batteries 20 are arranged, the positions of the side frames 45, 45' can be finely adjusted to conform to the total length of each row of batteries 20 in the predetermined axial direction X.

As shown in fig. 12, in the present embodiment, the battery 20 has a plurality of terminals 22, and the terminals 22 include a first terminal 24 and a second terminal 26, wherein in the present embodiment, the first terminal 24 is used as a negative electrode, and the second terminal 26 is used as a positive electrode, but in other applications, the invention is not limited thereto, and the first terminal may be a positive electrode, and the second terminal is a negative electrode. In addition, each battery 20 is further provided with a third terminal 28 between the first terminal 24 and the second terminal 26 for connecting with a battery monitoring device 30, thereby measuring the state of each battery 20. In addition, in the present embodiment, a group of four batteries 20 is included, and the third terminal 28 of each group of batteries is electrically connected through a conductive tab 29.

The battery pack 1 of the present embodiment is also provided with a plurality of battery lead tabs 50, 50' and a plurality of insulating cases 60. The battery lead tabs 50, 50' are grouped in pairs and disposed on the batteries 20 so as to electrically connect the first terminals 24 and the second terminals 26 of a group of battery packs; the insulating box 60 is used to isolate the terminals 22 and the battery lead tabs 50 on the terminals 22. The lead tab 29 is located between the two battery lead tabs 50, 50'.

Since the structure of each battery lead 50, 50' is the same, the structure of one of the battery leads 50 will be described later. As shown in fig. 12 to 14, the battery lead tab 50 is made of a conductive material, such as gold, silver, copper, aluminum, etc., and in the embodiment, the battery lead tab 50 is made of copper, but not limited thereto. The battery lead tab 50 includes a bridging portion 51, two first lead portions 52 and two second lead portions 53.

The bridge 51 has a first side 51a and a second side 51b opposite to each other, and a first surface 51c and a second surface 51d opposite to each other are disposed between the first side 51a and the second side 51 b. In this embodiment, the bridge 51 includes a main portion 511, a first branch portion 512 and a second branch portion 513, the first branch portion 512 and the second branch portion 513 are respectively connected to two ends of the main portion 511, the first branch portion 512 and the second branch portion 513 are substantially parallel, the first branch portion 512 has the first side 51a, and the second branch portion 513 has the second side 51 b.

The two first conductive portions 52 are connected to the first side 51a of the bridge 51 at intervals, and both extend toward a first direction D1. Each of the first guiding portions 52 has a first bending section 52a and a first connecting section 52b, the first bending section 52a is connected between the first side 51a of the first branch portion 512 and the first connecting section 52b, and the first connecting section 52b extends toward the first direction D1. In the present embodiment, the two first connecting sections 52b and the bridge 51 are located on different planes respectively, or, from the perspective of fig. 13, the two first connecting sections 52b are located on a plane lower than the bridge 51.

The two second conductive portions 53 are connected to the second side 51b of the bridge 51 at intervals and both extend toward a second direction D2, and the second direction D2 and the first direction D1 are opposite to each other. Each of the second guiding portions 53 has a second bending section 53a and a second connecting section 53b, the second bending section 53a is connected between the second side 51b of the second branch portion 513 and the second connecting section 53b, and the second connecting section 53b extends toward the second direction D2. In the present embodiment, the two second connecting sections 53b and the bridge 51 are located on different planes, or, from the perspective of fig. 13, the two second connecting sections 53b are located on a plane lower than the bridge 51.

In addition, each first connecting portion 52 of each battery connecting piece 50, 50' has a through hole 52c, each second connecting portion 53 has a through hole 53c, and each through

hole

52c, 53c is used for a connecting member S6 to pass through to be fixed on each terminal 22 of the battery pack.

In this embodiment, in use, when the two battery lead tabs 50,50 ' are assembled on the battery pack, first, the second surface 51d of the bridging portion of one of the battery lead tabs 50 ' is opposite to the second surface 51d of the bridging portion of the other battery lead tab 50, one of the battery lead tabs 50 ' electrically connects the first terminals 24 of the battery pack, and the other battery lead tab 50 electrically connects the second terminals 26 of the battery pack. In addition, preferably, a gap is maintained between one of the battery lead tabs 50 'and the other battery lead tab 50, and the battery lead tabs are not in contact with each other and are electrically insulated from each other, and in order to further prevent accidents such as short circuit between the two battery lead tabs 50, an insulating film may be further coated or coated on the bridging portion of each battery lead tab 50, 50', but not limited thereto. As shown in fig. 16, particularly, when the two battery lead tabs 50,50 'are assembled on a battery pack, the second surface of one of the battery lead tabs 50 at least partially overlaps the second surface of the other battery lead tab 50' in a vertical projection area. And, the two first connecting portions 52 of one of the battery connecting pieces 50 and the two second connecting portions 53 of the other battery connecting piece 50' are substantially located on the same straight line L1; and, the two first connecting portions 52 of one of the battery connecting pieces 50 and the two second connecting portions 53 of the other battery connecting piece 50' are staggered with each other.

Through the design of the battery tab 50, when the two battery tabs 50,50 'are assembled on the batteries 20 of the battery pack, the first connecting portions 52 and the second connecting portions 53 of the two battery tabs 50, 50' are substantially located on the same plane, so that the batteries 20 in the battery pack can be effectively connected in parallel when the batteries 20 are arranged side by side, and the space occupied by the batteries can be effectively reduced through the mutual matching of the two battery tabs 50,50 ', and further, the two battery tabs 50, 50' are arranged in the space between the terminals of the batteries 20, so that the overall height of the battery pack during assembly can be effectively reduced, thereby facilitating the design of the battery pack for miniaturization.

As shown in fig. 12, 15 and 17, the insulating case 60 includes a base 70 and an upper cover 80, wherein the base 70 is configured to be combined with a battery pack, the base 70 includes a bottom plate 72, the bottom plate 72 has a plurality of through holes 722 penetrating through two opposite surfaces of the bottom plate 72, the through holes 722 are provided for the terminals 22 to pass through, and after the terminals 22 pass through the through holes 722 of the base 70, a conductive sheet is installed on the terminals 22, so as to electrically connect the terminals 22.

The base 70 has four lower sidewalls 74 connected to the periphery of the bottom plate 72, wherein two opposite lower sidewalls 74 each have at least one first connection portion, and the first connection portion is one of a bump and a groove. In this embodiment, the number of the at least one first combining portion is two, and the first combining portion is a bump 742 protruding from the outer side surface of the lower sidewall 74, and the bump 742 has an inclined surface 742 a.

The upper cover 80 is detachably coupled to the base 70, and a chamber 60a is formed between the upper cover and the base 70, the chamber 60a is communicated with the through holes 722, and the terminal 22 extends into the chamber 60 a. The upper cover 80 has four upper side walls 82 corresponding to the lower side walls 74, wherein two opposite upper side walls 82 each have at least one second connecting portion, and the second connecting portion is another one of the bump and the groove. In this embodiment, the number of the at least one second combining portion is two and is the groove 824 a. Each upper sidewall 82 includes a main wall 822 and at least one extending plate 824, in this embodiment, two extending plates 824, the extending plates 824 are formed by extending downward from the main wall 822, and the extending plates 824 have grooves 824a to form second coupling portions. The upper cover 80 is disposed corresponding to the base 70, the extending plate 824 of the upper sidewall 82 slides downward along the inclined plane 742a of the protrusion 742 of the lower sidewall 74 outside the lower sidewall 74, so that each protrusion 742 extends into each groove 824a, and each upper sidewall 82 abuts against each lower sidewall 74, thereby completing the combination of the upper cover 80 and the base 70. The insulating case 80 has a plurality of openings 60b on its peripheral surface through which the guide pieces are inserted.

In this embodiment, the through holes 722 of the bottom plate 72 are arranged in a matrix, and the number of the through holes 722 is 12. The periphery of each through hole 722 of the bottom plate 72 is provided with a plurality of standing walls 76 surrounding each through hole 722, and the standing walls 76 are positioned in the chamber 60a and abut against the side surface 22a of the corresponding terminal 22. The top edge of the upright wall 76 is not lower than the top edge of the side 22a of the terminal 22 so as to cover the side 22a of the terminal 22, thereby forming an isolated space for accommodating a circuit such as a signal wire and preventing short circuit due to contact with a contact piece. In addition, the side surface 22a of at least one of the terminals 22 of each battery 20 in the battery pack has at least one positioning block 22b, the positioning block 22b has an inclined surface 22c and a blocking surface 22d, the inclined surface 22c is inclined outward from top to bottom in a direction away from the side surface 22a, the blocking surface 22d is connected to the bottom of the inclined surface 22c, and the blocking surface 22b of the positioning block 22b abuts against the vertical wall 76 to fix the base 70 to the battery pack. More specifically, at least a portion of the vertical walls 76 have a positioning slot 762 formed by the top edge of the corresponding vertical wall 76 being recessed toward the bottom plate 72, the blocking surface 22d of the positioning block 22b abuts against the bottom of the positioning slot 762, and the slot wall of the positioning slot 762 abuts against the side wall of the positioning block 22b in the lateral direction to limit the lateral displacement of the insulation box 60.

During assembly, a user can first assemble the base 70 of the insulating case 60 onto the terminals 22 and then fix the base to the terminals 22, and then place the battery tabs 50 to electrically connect with the terminals 22. In the present embodiment, referring to fig. 12 again, when placing, one of the battery lead tabs 50' is first installed in the base 70 with the second surface 51d facing upward, and the first lead-in portion 52 and the second lead-in portion 53 of the battery lead tab 50 are electrically connected to the second terminals 26 of the battery pack, and are fixed by the bonding members S6, then, another conductive tab 29 is disposed to electrically connect with the third terminals 28 of the battery pack, and fixed by the bonding member, another battery lead tab 50 is placed and installed in the base 70 with the first surface 51c facing upward (equivalent to the second surface 51d facing downward), the first lead-in portion 52 and the second lead-in portion 53 of the battery lead tab 50 are electrically connected to the first terminals 24 of the battery pack and fixed by the bonding member S6, and finally, the upper cover 80 is covered on the base 70.

In addition, as shown in fig. 18 to 21, the battery pack of the present embodiment further includes another insulating case 60 'and battery lead tabs 90, 90'. The insulating box 60 ' includes a base 70 ' and an upper cover 80 ', wherein the structure of the insulating box 60 ' is substantially the same as that of the insulating box 60, and the difference is that the number of terminals that can be accommodated in the insulating box 60 ' is less than that of the insulating box 60, and therefore, the structure thereof is not described herein again. In addition, a connecting tab 94 is disposed between the two battery connecting tabs 90, 90' for connecting the third terminals of the two batteries 20 in parallel.

The battery lead tabs 90, 90' are grouped in pairs and disposed on the batteries 20 so as to electrically connect the first terminals 24 and the second terminals 26 in a group of battery packs; the insulating box 60 'serves to isolate the terminals 22 from the battery lead tabs 90, 90' on the terminals 22.

Since the structure of each battery lead 90, 90' is the same, the structure of one of the battery leads 90 will be described later. The battery lead tab 90 is made of a conductive material, such as gold, silver, copper, aluminum, etc., and in the present embodiment, the battery lead tab 90 is made of copper, but it is not limited thereto for other applications. The battery lead tab 90 includes a bridging portion 91, two first lead portions 92 and two second lead portions 93. The bridge portion 91 has a first side 91a and a second side 91b opposite to each other, and a first surface 91c and a second surface 91d opposite to each other are disposed between the first side 91a and the second side 91 b.

The two first conductive portions 92 are connected to the first side 91a of the bridging portion 91 at intervals, and both extend toward a first direction D1. Wherein each of the first guiding portions 92 has a first extending section 92a, a first bending section 92b and a first connecting section 92c, and the first extending section 92a is connected to the first side 91 a; one side of the first bent section 92b is connected to one side of the first extending section 92a facing the first direction D1, and the other side of the first bent section 92b is connected to the first connecting section 92 c; the first connecting section 92c extends toward the first direction D1. In the present embodiment, the two first extending sections 92a are substantially located on the same plane as the bridging portion 91; the two first connecting sections 92c are substantially located on the same plane, but the first connecting sections 92c and the bridge portion 91 are located on different planes with respect to the bridge portion 91, and further, from the perspective of fig. 19, the first connecting sections 92c are located on a lower plane than the bridge portion 91.

The two second conductive portions 93 are connected to the second side 91b of the bridge portion 91 at intervals and both extend toward a second direction D2, and the second direction D2 and the first direction D1 are opposite to each other. Each second guiding connection portion 93 has a second extending section 93a, a second bending section 93b and a second connection section 93c, the second extending section 93a is connected to the second side 91 b; one side of the second bending section 93b is connected to one side of the second extending section 93a facing the second direction D2, and the other side of the second bending section 93b is connected to the second connecting section 93 c; the second connecting section 93c extends toward the second direction D2. In the present embodiment, the two second extending sections 93a are substantially located on the same plane as the bridging portion 91; the two second connecting sections 93c are substantially located on the same plane, but the second connecting sections 93c and the bridging portion 91 are located on different planes with respect to the bridging portion 91, and further, from the perspective of fig. 19, the second connecting sections 93c are located on a lower plane than the bridging portion 91. In addition, the second connecting sections 93c and the first connecting sections 92c are substantially located on the same plane. The manner of coupling the battery lead tabs 90 to the terminals of the battery 20 is the same as that of the battery lead tab 50, and thus, the description thereof is omitted.

In addition, particularly, in the present embodiment, when the two battery lead tabs 90,90 ' are assembled in a battery pack formed by two batteries 20 arranged in parallel, the second surface 91d of the bridging portion of one battery lead tab 90 ' faces the second surface 91d of the bridging portion of the other battery lead tab 90, one battery lead tab 90 ' electrically connects the second terminals 26 of the battery pack, and the other battery lead tab 90 electrically connects the first terminals 24 of the battery pack. In addition, preferably, a gap is maintained between one of the battery lead tabs 90 ' and the other battery lead tab 90, so that the battery lead tabs are not in contact with each other and are electrically insulated from each other, and in order to further prevent accidents such as short circuit between the two battery lead tabs 90,90 ', the bridging portion of each battery lead tab 90,90 ' may be further coated or coated with an insulating adhesive film, but not limited thereto. As shown in fig. 21, particularly, when the two battery lead tabs 90,90 'are assembled on a battery pack, the second surface of one of the battery lead tabs 90 at least partially overlaps the second surface of the other battery lead tab 90' in a vertical projection area. And, the two first connecting portions 92 of one of the battery connecting pieces 90 and the two second connecting portions 93 of the other battery connecting piece 90' are substantially located on the same straight line L2; and, the two first connecting portions 92 of one of the battery connecting pieces 90 and the two second connecting portions 93 of the other battery connecting piece 90' are staggered with each other.

By the design of the battery lead tabs 90,90 ', when the two battery lead tabs 90, 90' are assembled on the batteries 20 of the battery pack, the first lead parts 92 and the second lead parts 93 of the two battery lead tabs 90,90 'are substantially located on the same plane, so that the batteries 20 in the battery pack can be effectively connected in parallel when the batteries 20 are arranged side by side, and the space volume occupied by the two battery lead tabs 90, 90' can be effectively reduced by the mutual matching of the two battery lead tabs 90,90 ', furthermore, the two battery lead tabs 90, 90' are arranged in the space between the terminals of the batteries 20, so that the overall height of the battery pack during assembly can be effectively reduced, and the design of battery pack miniaturization is facilitated.

Through the design, the battery pack provided by the invention has high assembly reliability, can be manufactured in a large number in a modularized mode, can be suitable for electric vehicles, energy storage system architectures and the like, can be flexibly assembled to adjust the number of batteries in the battery pack according to the requirement of energy storage application capacity, and can be widely applied to the electric vehicles and the energy storage system architectures.

The above description is only a preferred embodiment of the present invention, and all equivalent changes and modifications to the present invention as described in the specification and claims should be included in the scope of the present invention.

Claims

1. A battery pack, comprising:

an outer box, which comprises a first box body, a second box body and a connecting frame; the first box body is provided with a first opening, the second box body is provided with a second opening which is matched with the first opening, and a containing chamber is formed between the first box body and the second box body; the connecting frame is connected to the second box body and provided with a first connecting strip and a second connecting strip, the first connecting strip is used for connecting the first box body, and the second connecting strip is used for connecting an installation part; and

a plurality of batteries arranged in the accommodating chamber;

the batteries are respectively provided with a first terminal and a second terminal, and the first terminal and the second terminal among the batteries are mutually staggered; the battery pack comprises a plurality of battery guide connecting pieces, each battery guide connecting piece comprises a bridging part, two first guide connecting parts and two second guide connecting parts, the bridging part is provided with a first side and a second side which are opposite, a first surface and a second surface which are opposite are arranged between the first side and the second side of the bridging part, and the second surface of the bridging part of one battery guide connecting piece and the second surface of the bridging part of the other battery guide connecting piece face each other; the two first conductive connecting parts are connected to the first side of the bridging part at intervals, and the two first conductive connecting parts extend along a first direction; the two second conductive connecting parts are connected to the second side of the bridging part at intervals and extend along a second direction; the first direction and the second direction are opposite to each other.

2. The battery pack according to claim 1, wherein each of the first connecting portions of each of the battery connecting tabs has a first extending section, a first bending section and a first connecting section, the first extending section is connected to the first side, one side of the first bending section is connected to one side of the first extending section facing the first direction, and the other side of the first bending section is connected to the first connecting section; each second guide connection part of each battery guide connection piece is provided with a second extension section, a second bending section and a second connection section, the second extension section is connected to the second side, one side of the second bending section is connected to one side, facing the second direction, of the second extension section, and the other side of the second bending section is connected with the second connection section.

3. The battery pack of claim 1, wherein the bridging portion of each of the battery tabs comprises a main portion, a first leg portion and a second leg portion, the first leg portion and the second leg portion are connected to opposite ends of the main portion, and the first leg portion and the second leg portion are substantially parallel, the first leg portion having the first side and the second leg portion having the second side.

4. The battery pack according to claim 3, wherein each of the first connecting portions of each of the battery connecting tabs has a first bent section and a first connecting section, the first bent section being connected between the first side of the first branch portion and the first connecting section; each second guiding connection part is provided with a second bending section and a second connecting section, and the second bending section is connected between the second side of the second branch part and the second connecting section.

5. A battery pack, comprising:

a plurality of batteries arranged in the accommodating chamber;

the connecting frame comprises a connecting plate, the connecting frame is combined on the periphery of the second box body through the connecting plate, and the two opposite sides of the connecting plate are respectively connected with the first connecting strip and the second connecting strip;

the first connecting strip is provided with an abutting surface deviating from the second connecting strip and a side surface connected with the abutting surface; the periphery of the first box body is used for abutting against the abutting surface, and an annular retaining wall is formed on the periphery of the first box body and surrounds the outer side of the side surface.

6. The battery pack according to claim 5, wherein the connecting frame is disposed around the outer circumference of the second case.

7. The battery pack according to claim 5, wherein the first connecting strip and the second connecting strip extend in the same direction from both sides of the connecting plate.

8. The battery pack according to claim 7, wherein the connecting plate, the first connecting strip and the second connecting strip are of an integrally formed structure.

9. The battery pack according to claim 5, wherein an adhesive tape is disposed between the first connecting strip and the periphery of the first opening of the first case.

10. The battery pack according to claim 9, wherein the adhesive tape has a plurality of through holes, and a gasket is disposed in each through hole, and two ends of the gaskets respectively abut against the first case and the first connecting strip.

11. The battery pack according to claim 5, wherein the cells are arranged in a predetermined axial direction; the battery pack comprises a battery fixing frame, wherein the battery fixing frame comprises an underframe, a first side frame and a second side frame, the first side frame comprises two side frames which are adjacently arranged on the underframe, each side frame comprises a main board, a first side frame strip and a second side frame strip, each main board is provided with a first blocking surface, the two side frame strips are respectively connected with two opposite sides of the main board, the first side frame strip is provided with a first through hole, the second side frame strip is provided with a second through hole, and the first through hole corresponds to the second through hole; the first through hole of each first side frame strip has a first width in the preset axial direction, the second through hole of each second side frame strip has a second width in the preset axial direction, and the first width is greater than the second width; wherein the first side frame strip of one side frame is adjacent to the second side frame strip of the other side frame and fixed by a combining piece passing through the first through hole of the adjacent first side frame strip and the second through hole of the second side frame strip; the second side frame is combined with the bottom frame, the second side frame is provided with two second blocking surfaces, each second blocking surface faces to the first blocking surface of the main board of each side frame, and the batteries are located between each first blocking surface and each second blocking surface.

12. The battery pack according to claim 11, wherein the first through hole of each of the first side frame strips is a circular hole, and the second through hole of each of the second side frame strips is an elongated hole having a long axis direction parallel to the predetermined axis direction.

13. The battery pack of claim 5, wherein the batteries have terminals; the battery pack comprises a plurality of insulating boxes arranged on the batteries, each insulating box comprises a base and an upper cover, the base is combined with the battery, the base comprises a bottom plate, the bottom plate is provided with a plurality of through holes penetrating through two opposite surfaces of the bottom plate, and the through holes are used for the terminals to penetrate through; the upper cover is detachably combined with the base, and a chamber is formed between the upper cover and the base and is communicated with the through holes.

14. The battery pack according to claim 13, wherein a plurality of vertical walls are disposed around the periphery of each through hole of the base plate, the vertical walls being disposed in the chamber and surrounding each through hole.

15. The battery pack according to claim 14, wherein at least a part of the terminals has at least one positioning block; the positioning blocks are abutted against at least one part of the vertical wall so as to fix the base on the battery.

16. The battery pack according to claim 15, wherein at least a portion of the vertical walls have a positioning groove formed by recessing the top edge of the corresponding vertical wall toward the bottom plate; the positioning blocks are respectively abutted against the positioning grooves.

17. The battery pack according to claim 5, wherein the cells are arranged in a predetermined axial direction; the battery pack comprises a battery monitoring device which is electrically connected with the batteries, and the battery monitoring device is positioned on one side of the batteries in the preset axial direction.

18. The battery pack according to claim 17, wherein the battery monitoring device is located within a projection range of the batteries in the predetermined axial direction.